Xeon E7 2830 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.133GHz vs 1.3GHz)
Larger L3 cache size (24MB vs 1.5MB)
Intel Xeon D 1577 's Advantages
Released 4 years and 10 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 105W)